The National Geographic Magazine, Volume 81National Geographic Society, 1942 - Geography Indexes kept up to date with supplements. |
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Page 457
This Is a War of Many Metals , for We Live in an Age of Alloys BY FREDERICK G. VOSBURGH A T THE Army's busy Bolling Field at As Germany's metal stock piles dwindled Washington the other day I watched under the drain of months of war ...
This Is a War of Many Metals , for We Live in an Age of Alloys BY FREDERICK G. VOSBURGH A T THE Army's busy Bolling Field at As Germany's metal stock piles dwindled Washington the other day I watched under the drain of months of war ...
Page 459
Tungsten is so tough and resistant to heat that it cannot be worked like other metals ; such wires are made by “ powder metallurgy ” —pulverizing the metal and compacting the powder ( p . 480 ) . As yet the potentialities of beryllium ...
Tungsten is so tough and resistant to heat that it cannot be worked like other metals ; such wires are made by “ powder metallurgy ” —pulverizing the metal and compacting the powder ( p . 480 ) . As yet the potentialities of beryllium ...
Page 463
Aluminum itself is more abundant than any other metal in the crust of the earth . It is present in the rocks and dirt under our feet , and there are ways of making it experimentally from clay . But the best commercial ore is bauxite ...
Aluminum itself is more abundant than any other metal in the crust of the earth . It is present in the rocks and dirt under our feet , and there are ways of making it experimentally from clay . But the best commercial ore is bauxite ...
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Contents
San Diego Cant Believe It By FREDERICK SIMPICH | 45 |
Sun Shines on San Diego 9 illustrations in color from naturalcolor photographs | 57 |
Java Assignment By DEE BREDIN | 89 |
Copyright | |
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